Electric-light attachment.



J. A. WILLIAMS. ELECTRIC LIGHT ATTACHMENT.

APPLICATION FILED JUNE 14, 1909.

Patented Jan. 3, 1911.

:[lQVENT DR 11' ALLAN VVILLIAMa.

JAMES ALLAN WILLIAMS. or. guou'ritunt. QujEB'Eq, sauna.

ELECTRIC-LIGHT ATTACHMENT.

Specification of Letters Patent.-

Patented Janis, 1911.

' Application filed June 14, 1909.- Serial No. 502,112.

To all whom it may concern: I

Be it known that I, JAMES ALLAN WIL- LIAMS, of the city of Montreal, in the Prov- I ,ince of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Electric Light Attachments, of which the following is a full, clear, and exact description.

This invention'rel'ates to adjustable brackets or supports for lamps,'being especially adapted to carry incandescent electric lamps and the main object of the invention is to provide a support capable of a greatyariety of adjustments so that when used over desks, drawing tables, and the like. the lamp may be very quickly and easily shifted to any desired position and there supported without the necessity of using any fastening devices.

0 A further object. of-the device is to construct a portable bracket or support that can be quickly clamped to .a table or desk ,and that can be extended or contracted without injuring the wires withinthe bracket.

vention :-Figure 1 is an elevation of the bracket or support showing same clamped to a table and showing the various parts in op erative relation. F1g.- 2 is a plan view of the clampingdevice. Fig. 3 is a sectional view of the lower joint adjacent the clamping de-- vice. Fig. 4 is a sectional view of the telescopic joint between the first and second sec tions. Fig. 5 is an enlarged sectional view 5 of the joint between the second and third sections. Fig. 6 is an enlarged sectional view of the joint adjacent the lamp socket.

Referring to the drawings, 7 designates on its upper slde with a post "or standard I 8' which is preferably formed integral there'- a nut 13 having a wrench handle 14 pivoted thereto to engage the threaded portion12 to thus move the clamping plate 9 upwardly 5 15 is secured to the upper clamping plate and extends downwardly through the lower In the drawings which illustrate this inthe lower clamping late which is provided ing an apertured boss 10 depending there- The post S-is threaded at 12' for a part of its 1ength, and above the plate 9 I provide or" downwardly on the post 8. A smallrod clamping plate, said rod being surrounded between the plates by a helical spring 16 adapted to keep said plates apart a suitable d stance so as to be ready to be quickly placed in position.' 4

. The upper end of the post 8 is plain and adapted to reoeivethe apertured lug 17 of the first joint 18 of the bracket. To hold this joint in position on the post 8, I provide A a sprung 19, operating in a slot in the post having a shoulder 20 adapted in its normal position to engage the upper face of the lug 17 The joint 18.is provided with a socket 21 adapted to receive a. tube 221 which 1s securely fastened thereto the socket 21 and the lug 18- being pivoted together at 23 and being adjustable with relation to each other by means of a thumb nut 24. It will thus be seen that the joint 18 may be revolved upon the post 8, while the socket 21 supporting the telescoping members may be turned angularly upon the pivotal point 23 and clamped in any desired "osition. The tube 22, which is fastened to t e socket 21, is

provided at its upper end with interior shoulders 25 and is. adapted to receive the tube 26' which telescopes within .same', and is provided with the exterior shoulders 27 which .act with the shoulders 25 to prevent the tubes from bein' pulled apart. The tube 26 is provided wit a longitudinal slot 28 by means of which the tube may be sprung into smaller circumference and which will hold the sides of said tube in close frictional contact with the interior surface ofthe tube 22. The tube 26 may thus be telescoped within the tube 22 but will be held frictionally at anydesired point without the use of any other means, and may be rotated onits axis within the tube 22 if it becomes desirable to turn the u per art of the bracke vided .with laterally extending bifurcated members 31. The upper half 32 of this joint is provided with a laterally extending tongue 33 which slides between the bifur- 'eated members 31 andis pivoted to same at 34. The member 32 is centrally apertured and provided ,withinterior shoulders 35 adapted to engage the shoulders 36 on the lower 'end of the tube' 37, which is inserted through the aperture of the member 32.

-The;tube 37 may be rotated within the member 32 and can be slid downwardly to teleadapted to telescope within each other respect to the member26 by means of the pivoted joint. A suitablet umb nut 38 is adapted to tighten the pivot 34 to hold. the

upper end of the bracket in any desired 0- s tion. The top of the tube 37 is vprovi ed with a pivoted joint 39' to which the lamp socket 40 may be attached, and by means of this joint the lamp may be thrnedat any convenient angle with respect to the tube 37. The tubular members 22, 26.; and 37 are all so that the bracket can be contracted practically within the length of one tube or extended to its full length. The interim; of

the telescopic tubes carries the electric. wire or cord 41 which enters at the joint 18 and is connected with the lamp socket 40 at the upper-"end.

By means of this bracket, several new modifications and adjustments are obtained over any of the brackets heretofore in use,

and a'lamp may be placed in such a variety justments a pivotal joint through the of positions that the device will be found of great convenience to draftsmen, and 'es ecially to dentists and physician's who requently r uire a lamp capable of all the aderein mentioned} 1 Having thus described my invention, what I claim is i j A lamp bracket comprising a pair of clamping members havin a post mounted thereon, and a lurality o tubular telescopic sections revolu 1y mounted on said posts, adjacent;' the post, means for frictionally'engaging,the second section within the first, a ivotal' joint connecting the extremities oft e second and third sections, means for telescoping the third section pivotal joint and a pivotal joint connectin the third sectlon with the lamp socket, sald third section being mounted to rotate on-its axis.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

J. ALLAN WILLIAMS.

Witnesses:

STUART R. W. ALLEN, E. B. MCKENZIE. 

